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that is very low, does it even run? they should be around 150 psi. try it now with a wet test. squirt a couple shots of oil in the spark plug hole right before you test a cylinder. if it goes up more than 10-15 psi, then the rings are shot. make sure you have an o ring on the end of the tester and the gauge is reliable to.

Its not in psi. I'll go check how its being measured. Runs fine. Rebuilt a while back. Idles a bit low, but I cleaned the IAT I think its called, and I think that fixed it. Can't get it to start atm for whatever reason.

ha maybe I'm not doing it correctly? 230000 miles, replaced cam, crank, 2 pistons, all rings and bearings, oil pump, water pump, starter, and radiator in last 2 months. It has been driven frequently since then, I've just been trying to figure out why it has been idling so low. IAT I'm pretty sure. I don't think my engine is dead.

ha maybe I'm not doing it correctly? 230000 miles, replaced cam, crank, 2 pistons, all rings and bearings, oil pump, water pump, starter, and radiator in last 2 months. It has been driven frequently since then, I've just been trying to figure out why it has been idling so low. IAT I'm pretty sure. I don't think my engine is dead.

my 93 xj idles at 200-300 rpms.. I did a compression test a couple days ago and most of my cylinders were at 100psi..cyl#1 was at 50!!!! so now i know that is my problem and i can stop changing parts.. thats your problem with low idle if your readings are correct...